Given:
To find:
The error that a student has made while solving the equation.
Solution:
We have,
Using distributive property, we get
Subtract 6 from both sides.
Divide both sides by -2.
The value of x is 1.
In step 2, the distributive property is not used properly because when -2 is distributive with -3 then we get 6 instead of -6.
Therefore, the student has made error in step 2.
Answer:
Total area is all area of a 2D shape or 3D shape combined.
You need to write out a formula for each shape.
Shape 1 ) A = L x H for any 4 sided 2D shapes
Shape 2) For irregular 4 sided 2D shapes you need to draw a line to create 2 triangles
L x L x L + L x L x L = A
Shape 3) For Trapezoid
Surface area can be given with this formula: Surface Area of Trapezoidal Prism = (b1+b2)h + PH. In this formula, b1 and b2 stand for the length of the bases of the trapezoid. Lower case h is the height of the trapezoid. Upper case P is the perimeter of the trapezoid, and upper case H is the height of the prism
Shape 4 cuboid or prism
You take the surface area x (above)
so that;
A + A of each face = Total combined Area.
Except for Rectangular prism where we first find the longer L x H = A
Then; A + A of each face if 3 different sizes faces would be A x 2 A x 2 A x 2. if 2 different sizes would be A x 2 A x 4 so that prism with 6 sides would equal 6
Some prism have 5 sides like a triangular prism
A x 2 A x 3
We would do the rectangles first to remind us the process of Volume for other questions.
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For circles we use A = π × r2
For cylinders we use A of the circle (just mentioned) so that A+ A are the circular areas then work out the area of the Side and add them using the formula 2πr2 + 2πrh.
Formula for sphere =A=4πr2
Step-by-step explanation:
The numerator is 72 and the denominator is 2. 72/2
Answer:
[1]
Given:
Remove the parenthesis, we get;
Like terms are the those terms with same variable and powers.
Combine like terms;
To write this polynomial in standard form, you write starting with the term with the highest degree, or exponent(i.e ), and then in decreasing order .
Standard form:
To, classify a polynomial by degree, you just look at the highest exponent, or degree.
Since, 3 is the highest degree (), it is a cubic.
Now, classify a polynomial by the number of terms, count how many terms are in the polynomial( )
Number of terms: 4 (so this is polynomial)
[2]
Similarly,
for
Remove the parenthesis, we get;
Combine like terms; we have
Standard form:
Degree of the polynomial is, 2
Number of terms: 3 ( so, this is trinomial)
X/16 = 12/20
20x = 192
x = 192/20
x = 9,6